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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">com.google.android.exoplayer2.audio</a></div>
<h2 title="Class BaseAudioProcessor" class="title">Class BaseAudioProcessor</h2>
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<li><a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">java.lang.Object</a></li>
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<li>com.google.android.exoplayer2.audio.BaseAudioProcessor</li>
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<dt>All Implemented Interfaces:</dt>
<dd><code><a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></code></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><code><a href="SilenceSkippingAudioProcessor.html" title="class in com.google.android.exoplayer2.audio">SilenceSkippingAudioProcessor</a></code>, <code><a href="TeeAudioProcessor.html" title="class in com.google.android.exoplayer2.audio">TeeAudioProcessor</a></code></dd>
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<hr>
<pre>public abstract class <span class="typeNameLabel">BaseAudioProcessor</span>
extends <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a>
implements <a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></pre>
<div class="block">Base class for audio processors that keep an output buffer and an internal buffer that is reused
 whenever input is queued. Subclasses should override <a href="#onConfigure(com.google.android.exoplayer2.audio.AudioProcessor.AudioFormat)"><code>onConfigure(AudioFormat)</code></a> to return
 the output audio format for the processor if it's active.</div>
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<h3>Nested classes/interfaces inherited from interface&nbsp;com.google.android.exoplayer2.audio.<a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></h3>
<code><a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a>, <a href="AudioProcessor.UnhandledAudioFormatException.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.UnhandledAudioFormatException</a></code></li>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Field</th>
<th class="colLast" scope="col">Description</th>
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<tr class="altColor">
<td class="colFirst"><code>protected <a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inputAudioFormat">inputAudioFormat</a></span></code></th>
<td class="colLast">
<div class="block">The current input audio format.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#outputAudioFormat">outputAudioFormat</a></span></code></th>
<td class="colLast">
<div class="block">The current output audio format.</div>
</td>
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<h3>Fields inherited from interface&nbsp;com.google.android.exoplayer2.audio.<a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></h3>
<code><a href="AudioProcessor.html#EMPTY_BUFFER">EMPTY_BUFFER</a></code></li>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">BaseAudioProcessor</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#configure(com.google.android.exoplayer2.audio.AudioProcessor.AudioFormat)">configure</a></span>&#8203;(<a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a>&nbsp;inputAudioFormat)</code></th>
<td class="colLast">
<div class="block">Configures the processor to process input audio with the specified format.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#flush()">flush</a></span>()</code></th>
<td class="colLast">
<div class="block">Clears any buffered data and pending output.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://developer.android.com/reference/java/nio/ByteBuffer.html" title="class or interface in java.nio" class="externalLink" target="_top">ByteBuffer</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOutput()">getOutput</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a buffer containing processed output data between its position and limit.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#hasPendingOutput()">hasPendingOutput</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns whether the current output buffer has any data remaining.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isActive()">isActive</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns whether the processor is configured and will process input buffers.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isEnded()">isEnded</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns whether this processor will return no more output from <a href="AudioProcessor.html#getOutput()"><code>AudioProcessor.getOutput()</code></a> until it
 has been <a href="AudioProcessor.html#flush()"><code>AudioProcessor.flush()</code></a>ed and more input has been queued.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>protected <a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onConfigure(com.google.android.exoplayer2.audio.AudioProcessor.AudioFormat)">onConfigure</a></span>&#8203;(<a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a>&nbsp;inputAudioFormat)</code></th>
<td class="colLast">
<div class="block">Called when the processor is configured for a new input format.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onFlush()">onFlush</a></span>()</code></th>
<td class="colLast">
<div class="block">Called when the processor is flushed, directly or as part of resetting.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onQueueEndOfStream()">onQueueEndOfStream</a></span>()</code></th>
<td class="colLast">
<div class="block">Called when the end-of-stream is queued to the processor.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onReset()">onReset</a></span>()</code></th>
<td class="colLast">
<div class="block">Called when the processor is reset.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#queueEndOfStream()">queueEndOfStream</a></span>()</code></th>
<td class="colLast">
<div class="block">Queues an end of stream signal.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>protected <a href="https://developer.android.com/reference/java/nio/ByteBuffer.html" title="class or interface in java.nio" class="externalLink" target="_top">ByteBuffer</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#replaceOutputBuffer(int)">replaceOutputBuffer</a></span>&#8203;(int&nbsp;count)</code></th>
<td class="colLast">
<div class="block">Replaces the current output buffer with a buffer of at least <code>count</code> bytes and returns
 it.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reset()">reset</a></span>()</code></th>
<td class="colLast">
<div class="block">Resets the processor to its unconfigured state, releasing any resources.</div>
</td>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a></h3>
<code><a href="https://developer.android.com/reference/java/lang/Object.html#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink" target="_top">wait</a></code></li>
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<h3>Methods inherited from interface&nbsp;com.google.android.exoplayer2.audio.<a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></h3>
<code><a href="AudioProcessor.html#queueInput(java.nio.ByteBuffer)">queueInput</a></code></li>
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<h4>inputAudioFormat</h4>
<pre>protected&nbsp;<a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a> inputAudioFormat</pre>
<div class="block">The current input audio format.</div>
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<h4>outputAudioFormat</h4>
<pre>protected&nbsp;<a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a> outputAudioFormat</pre>
<div class="block">The current output audio format.</div>
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<h4>BaseAudioProcessor</h4>
<pre>public&nbsp;BaseAudioProcessor()</pre>
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<h4>configure</h4>
<pre class="methodSignature">public final&nbsp;<a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a>&nbsp;configure&#8203;(<a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a>&nbsp;inputAudioFormat)
                                           throws <a href="AudioProcessor.UnhandledAudioFormatException.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.UnhandledAudioFormatException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="AudioProcessor.html#configure(com.google.android.exoplayer2.audio.AudioProcessor.AudioFormat)">AudioProcessor</a></code></span></div>
<div class="block">Configures the processor to process input audio with the specified format. After calling this
 method, call <a href="AudioProcessor.html#isActive()"><code>AudioProcessor.isActive()</code></a> to determine whether the audio processor is active. Returns
 the configured output audio format if this instance is active.

 <p>After calling this method, it is necessary to <a href="AudioProcessor.html#flush()"><code>AudioProcessor.flush()</code></a> the processor to apply the
 new configuration. Before applying the new configuration, it is safe to queue input and get
 output in the old input/output formats. Call <a href="AudioProcessor.html#queueEndOfStream()"><code>AudioProcessor.queueEndOfStream()</code></a> when no more input
 will be supplied in the old input format.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="AudioProcessor.html#configure(com.google.android.exoplayer2.audio.AudioProcessor.AudioFormat)">configure</a></code>&nbsp;in interface&nbsp;<code><a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>inputAudioFormat</code> - The format of audio that will be queued after the next call to <a href="AudioProcessor.html#flush()"><code>AudioProcessor.flush()</code></a>.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The configured output audio format if this instance is <a href="AudioProcessor.html#isActive()"><code>active</code></a>.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="AudioProcessor.UnhandledAudioFormatException.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.UnhandledAudioFormatException</a></code> - Thrown if the specified format can't be handled as input.</dd>
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<h4>isActive</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;isActive()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="AudioProcessor.html#isActive()">AudioProcessor</a></code></span></div>
<div class="block">Returns whether the processor is configured and will process input buffers.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="AudioProcessor.html#isActive()">isActive</a></code>&nbsp;in interface&nbsp;<code><a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></code></dd>
</dl>
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<h4>queueEndOfStream</h4>
<pre class="methodSignature">public final&nbsp;void&nbsp;queueEndOfStream()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="AudioProcessor.html#queueEndOfStream()">AudioProcessor</a></code></span></div>
<div class="block">Queues an end of stream signal. After this method has been called,
 <a href="AudioProcessor.html#queueInput(java.nio.ByteBuffer)"><code>AudioProcessor.queueInput(ByteBuffer)</code></a> may not be called until after the next call to
 <a href="AudioProcessor.html#flush()"><code>AudioProcessor.flush()</code></a>. Calling <a href="AudioProcessor.html#getOutput()"><code>AudioProcessor.getOutput()</code></a> will return any remaining output data. Multiple
 calls may be required to read all of the remaining output data. <a href="AudioProcessor.html#isEnded()"><code>AudioProcessor.isEnded()</code></a> will return
 <code>true</code> once all remaining output data has been read.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="AudioProcessor.html#queueEndOfStream()">queueEndOfStream</a></code>&nbsp;in interface&nbsp;<code><a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></code></dd>
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<h4>getOutput</h4>
<pre class="methodSignature">@CallSuper
public&nbsp;<a href="https://developer.android.com/reference/java/nio/ByteBuffer.html" title="class or interface in java.nio" class="externalLink" target="_top">ByteBuffer</a>&nbsp;getOutput()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="AudioProcessor.html#getOutput()">AudioProcessor</a></code></span></div>
<div class="block">Returns a buffer containing processed output data between its position and limit. The buffer
 will always be a direct byte buffer with native byte order. Calling this method invalidates any
 previously returned buffer. The buffer will be empty if no output is available.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="AudioProcessor.html#getOutput()">getOutput</a></code>&nbsp;in interface&nbsp;<code><a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A buffer containing processed output data between its position and limit.</dd>
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<h4>isEnded</h4>
<pre class="methodSignature">@CallSuper
public&nbsp;boolean&nbsp;isEnded()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="AudioProcessor.html#isEnded()">AudioProcessor</a></code></span></div>
<div class="block">Returns whether this processor will return no more output from <a href="AudioProcessor.html#getOutput()"><code>AudioProcessor.getOutput()</code></a> until it
 has been <a href="AudioProcessor.html#flush()"><code>AudioProcessor.flush()</code></a>ed and more input has been queued.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="AudioProcessor.html#isEnded()">isEnded</a></code>&nbsp;in interface&nbsp;<code><a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></code></dd>
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<pre class="methodSignature">public final&nbsp;void&nbsp;flush()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="AudioProcessor.html#flush()">AudioProcessor</a></code></span></div>
<div class="block">Clears any buffered data and pending output. If the audio processor is active, also prepares
 the audio processor to receive a new stream of input in the last configured (pending) format.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="AudioProcessor.html#flush()">flush</a></code>&nbsp;in interface&nbsp;<code><a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></code></dd>
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<pre class="methodSignature">public final&nbsp;void&nbsp;reset()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="AudioProcessor.html#reset()">AudioProcessor</a></code></span></div>
<div class="block">Resets the processor to its unconfigured state, releasing any resources.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="AudioProcessor.html#reset()">reset</a></code>&nbsp;in interface&nbsp;<code><a href="AudioProcessor.html" title="interface in com.google.android.exoplayer2.audio">AudioProcessor</a></code></dd>
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<pre class="methodSignature">protected final&nbsp;<a href="https://developer.android.com/reference/java/nio/ByteBuffer.html" title="class or interface in java.nio" class="externalLink" target="_top">ByteBuffer</a>&nbsp;replaceOutputBuffer&#8203;(int&nbsp;count)</pre>
<div class="block">Replaces the current output buffer with a buffer of at least <code>count</code> bytes and returns
 it. Callers should write to the returned buffer then <a href="https://developer.android.com/reference/java/nio/ByteBuffer.html#flip()" title="class or interface in java.nio" class="externalLink" target="_top"><code>ByteBuffer.flip()</code></a> it so it can be
 read via <a href="#getOutput()"><code>getOutput()</code></a>.</div>
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<pre class="methodSignature">protected final&nbsp;boolean&nbsp;hasPendingOutput()</pre>
<div class="block">Returns whether the current output buffer has any data remaining.</div>
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<h4>onConfigure</h4>
<pre class="methodSignature">protected&nbsp;<a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a>&nbsp;onConfigure&#8203;(<a href="AudioProcessor.AudioFormat.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.AudioFormat</a>&nbsp;inputAudioFormat)
                                          throws <a href="AudioProcessor.UnhandledAudioFormatException.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.UnhandledAudioFormatException</a></pre>
<div class="block">Called when the processor is configured for a new input format.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="AudioProcessor.UnhandledAudioFormatException.html" title="class in com.google.android.exoplayer2.audio">AudioProcessor.UnhandledAudioFormatException</a></code></dd>
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<pre class="methodSignature">protected&nbsp;void&nbsp;onQueueEndOfStream()</pre>
<div class="block">Called when the end-of-stream is queued to the processor.</div>
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<pre class="methodSignature">protected&nbsp;void&nbsp;onFlush()</pre>
<div class="block">Called when the processor is flushed, directly or as part of resetting.</div>
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<pre class="methodSignature">protected&nbsp;void&nbsp;onReset()</pre>
<div class="block">Called when the processor is reset.</div>
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